Add 18/10 and 21/7
1st number: 1 8/10, 2nd number: 3 0/7
18/10 + 21/7 is 24/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
18/10 = 18 × 7/10 × 7 = 126/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Add the two like fractions:
126/70 + 210/70 = 126 + 210/70 = 336/70 - 336/70 simplified gives 24/5
- So, 18/10 + 21/7 = 24/5
In mixed form: 44/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/10+21/7 18/10+42/7 18/20+21/7 18/10+21/14 54/10+21/7 18/10+63/7 18/30+21/7 90/10+21/7 18/50+21/7 18/10+21/35 18/70+21/7 18/10+21/49